Lua

Control ASCII Download Line Endings (CrlfMode)

Demonstrates the CrlfMode property, which controls line-ending conversion when downloading in ASCII transfer mode: 0 leaves them as received, 1 converts to CRLF, 2 to LF, and 3 to CR.

Background: When you deliberately download text in ASCII mode, CrlfMode lets you force the saved file's line endings to a specific convention — CRLF for Windows tools, LF for Unix — regardless of what the server sends. It applies only in ASCII mode, so pair it with SetTypeAscii; in the recommended default binary mode, bytes are preserved verbatim and this setting has no effect. Reserve ASCII mode (and this property) for the rare case where line-ending normalization of text is actually wanted.

Chilkat Lua Downloads

Download Chilkat for Lua

Lua

local chilkat = require("chilkat")

local ftp = chilkat.Ftp2.new()

ftp.hostname = "ftp.example.com"
ftp.username = "myFtpLogin"

-- Normally you would not hard-code the password in source.  You should instead obtain it
-- from an interactive prompt, environment variable, or a secrets vault.
ftp.password = "myPassword"

local success = ftp:connect()
if not success then
    print(ftp.last_error_text)
    return
end

-- CrlfMode controls line-ending conversion for ASCII-mode downloads:
--   0 = leave line endings as received (default)
--   1 = convert to CRLF
--   2 = convert to LF
--   3 = convert to CR
-- Convert a downloaded text file's line endings to CRLF (useful when saving for Windows).
ftp.crlf_mode = 1

-- CrlfMode applies only in ASCII transfer mode.
success = ftp:set_type_ascii()
if not success then
    print(ftp.last_error_text)
    return
end

success = ftp:get_file("public_html/readme.txt", "qa_output/readme.txt")
if not success then
    print(ftp.last_error_text)
    return
end

print("Downloaded with CRLF line endings.")

success = ftp:disconnect()
if not success then
    print(ftp.last_error_text)
    return
end